Railway car truck



June 15, 1943. K F. NYSTRQM Em.

RAILWAY can TnUcx Filed qst. s', 1941' v 2 sheets-smet 1 K. F. NY's'rRoM la-ru; 2,321,845

RAILWAY GAR TRUCK Filed oct. s, 1941 f 2 sheets-sheet 2 June 15, 1943.

Patented June 15, 1943 RAILWAY CAR TRUCK Karl F. Nystrom and Vernon L. Green,

. Milwaukee, Wis; v y l vApplication October 6, 1'941, SerialNo. `413,850

s claims. (c1. s- 197) v Our invention relates more particularly to trucks for railwayfreight cars and involves a main or outer frame or wheel piece provided with integral journal boxes and having side openings. and an inner or sub-frame yieldably supported on the main frame by triple coil springs and held in lateral and longitudinal alignment with the, outer frame through the medium rof a removable shoe which permits removal of the wheel piece when wheel change becomes necessary without disturbing any portion of the truck except the shoes and wheel piece. y

The invention also contemplates aconstruc- Mounted within the main frame or wheel piece l0 is ,a sub-frame I6 provided adjacent its top with extended ends Il and at its intermediate portion witha bolster receiving opening. f

.The ends. I'I of the sub-frame are each provided with a shoe I8, see Figures l and 2. Themain portion ofthe shoe is shown in the nature 'l of a 'fla'tplate (see Figure 2) which isprov'ided with aj plurality of upstanding studs or `pinsIiI-y which .extend into holes formed in the lbottom surface ofzthe extended ends of the .sub-,frame thereby removably connecting the shoes to the' sub-frame," The outer ends of theshoes are vertion wherein the brake rigging is carried by the sub-frame thus providing a spring borne brake( place by interengaging surfaces on the upper element of the sandwich and the truck bolster and on the bottom element of the sandwich" and the spring plank which is secured to the sub-frame.

'Ihe invention has for its object the provision of a truck which permits the use of coil springs with high deflection fand wherein a shear deflection between the 4sub-frame and the bolster is provided through the rubber sandwich, wherebythe riding qualityV of the car is greatly improved. I

The objects and advantages inherent in the construction all will be readily comprehended from the detailed description of the accompanying drawings wherein: y

Figure 1 is a plan view of'one side of ourimproved truck with portions broken awayyand shown in section.

Figure 2 is a longitudinal sectional view taken on the'oiset line 2-2 of Figure 1, looking in the direction of the arrows. p

Figure '3 is a vertical sectional -view taken on the line 3-3 of Figure 2 looking in the direction oi the arrows.

Figure 4 is a detail perspective View of the bolster supporting resilient means. r

In the particular exemplication of the invention, the main frame or wheel piece II), consisting of the top and bottom rails II and I2 and vertically disposed columns I3,v is provided at its ends with journal boxes I4 and with spring seats I5 adjacent the Journal box portions oi' the frame.

tically enlarged coextensive with the thickness vof the sub-frame ends as shown at 20, Figure 2, and the outervertical face of the enlarged portion of each shoe formed to extend into a `vertically disposed socket as-at 2i formed in the adjacent portion of the 4wheel.piecelII and permits relative vertical movement between the sub-frame and wheel piece or main iframe I0; the interengaging relation between the shoes and the wheel piecev maintaining the sub-frame in lateral and longitudinal alignment with the wheel piece. In order to compensate ,for wear the contacting Asurfaces of thev shoes and the wheel piece sockets or. pockets are preferably provided with steel liners as shown at 22,' see Figure 1.

As isnapparent from the construction, the connection between the sub-frame I6 and thewheel piece orouter. frame Iii may be readily disrupted or` released byldis'engaging the shoesfrom the vertical slideways or sockets in the outer frame; the arrangement permitting wheel changes to be made without disturbing any portion ofthe truck except the shoes I8 .and thewheel piece or outer-,frame IIIa s the brake rigging and bolster supporting means (later described) are entirely ycarried by the subframe I6; the brake hangers being mounted on the extensions or `brackets23 formed on the sub-frame. With this arrangement the brake rigging is spring borne and therefore less subject to Wear and failure.

The lowenfaces ofthe shoes I8 vare formed to provide proper seats for the triple coil springs 24 which also seat on the spring seats I5 formed in the wheelpiece or outer frame I0. l y

vThe construction of the wheel piece and of the sub-frar'nepermits the coil springs to be placed close to the-truck axles and also enables4 the use of triple coilspri'ngs with Aa `highhdeiiection which greatly improves the ridingguality .of the car; `for example, springs with athreev and a half inch, total deflection., as compared with about one land nve-eighths inches employedI with the The truck bolster 2a is provided with reduced' end portions 29 which extend into the windowopenings ofthe sub-frame and are supported on the bottom rail of the sub-frame through the medium of a rubber "sandwich composed of eemparatively thick rubber pads, 30, I which are bonded to the. steel plates 34,36, iii; the "sandwich preferably being substantially coextensive with the width of the bolster ends as shown in Figure 2. The sandwich at each side of the truck is operatively or non-shiftably connected to the ends of the bolster 28 and to the spring plank 25 by means *of studs or lugs 32 welded or integrally secured to the top and bottom plates 3l; the lugs. 32 of the top plate engaging in holes or notches formed in the bottom surface of the ends of the truck bolster 28 while the lugs 32 on the bottom plate 3|. enter holes formed at the ends of the spring plank 25; the latter being nonshiftably secured to the sub-frame as heretofore described. The construction described permits the truck bolster to have lateralmotion through the shear deflection of the rubber sandwiches which absorb the vibrations of the sub-frame and of the truck bolster.

In order to limit the degree of lateral motion of theA bolster, the ends of the latter are shown provided with the spaced lugs 33 arranged on each Yside of the bolster; the lugs on the same side of the bolster being spaced apart a predetermined distance greater than the width of the sub-frame through which the end of the bolster extends.

The lugs 33, as shown in Figure 1, will contact the columns i6a of the sub-frame in the event of excessive movement of the bolster transversely of the truck.

The depth ofthe pins or studs 32 of .the sandwiches is such that the pins will clear the openings or notches in the spring plank 25 or in the bottom of the bolster when the latter is jacked up thus enabling assembly and dissoci-` ation to be easily accomplished.

The exempliflcation of the invention is believ to be the best embodiment thereof, but certain structural modifications are possible and may be made without. however, departing from the spirit of our invention as defined in the append; ed claims. l s 1 What we claim is:

l. A railway car truck comprising an outer frame composed of top and bottom rails terminating at their ends in integral journal boxes having open-ended vertical slots in their side walls, the bottom rail being provided with spring seats adjacent the journal boxes; a sub-frame composed of top and bottom rails united adjacent the top of the frame in horizontally disposed ends, said sub-frame being arranged within the outer frame in spaced relation with the top and the bottom rails thereof and with its and extending into said vertical slots whereby alignment between the two frames is maintained and relative vertical movement between the outer frame and the sub-frame is permitted while movement of said members out of said slots permits removal ot the outer frame; and high deection springs between said spring seats and said removable members.

2. A railway car truck comprising a pair of outer frames and a' pair of sub-frames: the outer frames being provided at the ends with integral journal boxes and spring seats adjacent the Journal boxes, the outer frames adjacent the journal boxes being provided with vertically extending open-ended recesses; the sub-frames being arranged within the outer frames and provided with ends extending above the spring seats; removable shoes having pin-and-socket connection with the lower faces of the sub-frame ends and adapted to extend into said recesses for maintaining alignment between the outer and the sub-frames; high deflection springs mounted between the spring seats and said shoes; and a spring plank fox` anchoring the two sub-frames together, the ends of the spring plank having vertically releasable interengagement with the subframes.

3. A railway car truck comprising a pair of outer frames and a pair of sub-frames yieldingly mounted within the outer frames, all of the lframes being provided with window-openings;

removable means insupporting relation with the ends of the sub-frames and in interengaging relation with the outer frames whereby the frames are maintained in lateral and longitudinal alignment and dissociation of the outer frames and the sub-frames permitted; a spring plank whose ends have interlocking engagement with the subframes at opposite sides of the truck; a rubber cushion element arranged on each end of the spring plank within the window-openings of the sub-frames: and a truck bolster whose ends are seated on said cushion elements.

4. In a railway car truck, outer frames composed of top rails and bottom rails united at the ends in journal box forming portions and having window-openings, the side walls of said journal box portions being provided with open ended vertical slots while the bottom rail .adjacent the `journal box portions is provided -with springseats; sub-frameseach composed of top and bottom beams u nited adjacent the top in longitudinally disposed flat-faced ends, the sub-frames being arranged within the outer frames and provided with brake hanger brackets and with window-openings; shoes removably engaged with the ends of the sub-frames and arranged to slide vertically in said vertical slots to maintain alignment between the outer frames and the subframes; coil springs arranged on said spring seats in supporting relation with said shoes; a spring plank disposed transversely of the truck for linking the sub-frames at opposite sides of the truck together, the ends of the plank having lug-andsocket relation with the bottom rails of the subframes; a rubber cushion element arranged on each end of the spring plank; and a truck bolster whose ends extend into said window-openings and seat on said cushion elements whereby lateral movement between the bolster and the sub-frames is permitted through shear deflection of the cushion elements.

5. A railway car truck comprising a pair of outer frames or wheel pieces and a pair of bolster carrying sub-frames/,arranged within the wheel pieces, the wheel pieces and the sub-frames being composed of top and bottom rails united adjacent the ends, the wheel pieces at their ends being provided with integral journal boxes, ver.

tically extending recesses adjacent the upper rails and spring seats on the bottom rails adjacent Athe journal boxes, the sub-frames being arranged between the top and bottom rails of the wheel pieces and provided at the top with longitudinally disposed ends disposed above the spring seats on the bottom rails of the wheel pieces and terminating a distance removed from said recesses:

Fremovable shoes arranged on the bottom oi' aid i0 shoes in place.

-, with the bottoms oi said shoes for yieldingly supporting'the sub-frames and maintaining said KARL F. NYs'rRoM. VERNON L. GREEN. 

